FIZIKA A 2 (1993) 2, 101-110

THE MODEL FOR THE MAGNETIZATION OF CURRENT CARRYING AMORPHOUS FERROMAGNETS

STJEPAN SABOLEK
Department of Physics, Faculty of Science, POBox 162, 41000 Zagreb, Croatia

Received 19 July 1993

Original scientific paper

A recent model for the explanation of the decrease of coercive field H_c and the core loss E in amorphous ribbons carrying a direct current J_d has been extended in order to account for the effects of an alternating core current J. The model predicts a linear decrease of H_c with the amplitude J₀ of J and the achievement of H_c=0 for J₀ which is sufficient in order to release the domain walls responsible for H_c in the absence of the drive field H. The actual shape and frequency of the core current pulses appear to be immaterial as long as the condition J=J₀ at H = 0 is fulfilled. The accurate measurements performed on the stress-free Co_70.3Fe_4.7Si₁₅B₁₀ and twisted Fe₈₀B₂₀ ribbons confirm the validity of the model. Some applications of the phenomenon are briefly discussed.

UDC 538.955

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